Depends on where you are. Here in the Netherlands, file sharing per se was declared legal last week (over Kazaa, but, by inference, this would apply to LW too). In this country, we have the very odd situation, though, that downloading files is legal, but allowing people to download (distributing) copyrighted material is not. In other words, it would be completely legal for me to download gigabytes and gigabytes of music, movies and what have you, as long as I allow nobody to download them off me.